My Hyde is a high stimulant supplement from ProSupps. Their official website states this is the most extreme and effective pre-workout on the market.

So with that in mind lets take an in-depth look to find out if this is really true.

ProSupps claim Mr Hyde will give you:

Significant Muscle Pumps

Enhanced Endurance

Maximum Performance

Focus, Muscular Strength and Power

ProSupps are an established gym supplements company founded in 2004. Based in Allen Texas, USA they produce a variety of weight loss, pre-workouts and a testosterone booster called Halotropin.

First lets look at the science behind their nutrient profile…

What are the ingredients and how do they work?

Ingredient Overview

Overall we like the mix of great proven pre workout ingredients which includes caffeine, L-citrulline and creatine. On the downside there are one or two ingredient that either have side effects or just don’t work.

While the label lists the formulas as proprietary blends the numbers do add up; we can see clearly what dosages of ingredients we are consuming.

Mr Hyde is certainly a high stimulant supplement with a whopping 376mg of caffeine. Without a doubt you will be highly energized but potentially fall victim to some negative side effects.

The L-Citrulline is under dosed, don’t expect much of a muscle pump from 500mg. We would say the creatine dosage is effective for a pre workout.

Overall the formula looks promising, but let’s take a closer look at the nutrients….

Mr Hyde is a high stimulant supplement

Niacin (25mg)

This is Vitamin B3 and nothing really special for a pre workout.

Although it is an essential vitamin most people don’t have a deficiency in B3.

There are some theories that it has some mild cardiovascular effects – but nothing really promising.

Strength Matrix (4.5g)

Beta Alanine (CarnoSyn®) (2.5g)

A popular pre workout ingredient because it can improve muscle endurance and power output.

This amino acid works by buffering the acid in your muscle. Great for explosive power; you should notice better performance in the first few minutes of your exercise.

However this performance comes with a price. Research has shown that it causes paresthesia (pins & needles) when consumed in quantities over 0.8-1g.

This is a tingling/burning sensation that you feel in your neck and arms.

While it is not harmless the side effects can be very distracting and ruin your workout.

Creatine Nitrate (NO3-T®) (1g)

An excellent choice for both strength & endurance.

Studies have shown that by supplementing with creatine the amount of adenosine triphosphate (ATP) in the bloodstream increases.

Your muscles use this ATP for energy. Therefore the increase means your muscles are able to perform with a higher intensity, with a higher power output for longer.

This is a good addition for those who want to boost their strength in the gym and it comes with an effective dose for a pre workout.

Agmatine Sulfate (AGMAPURE®) (500mg)

Not the best nutrient choice really.

This amino acid is meant to increase muscular energy by increasing muscle storage of glycogen and water.

It can also acts as a vasodilator promoting nitric oxide production and improving blood flow.

Human studies are limited so there is no real concrete evidence of its effectiveness so far.

L-Citrulline Aspartate (1:1) 500mg

One of the best amino acids available for both muscle pumps and endurance.

Numerous studies have shown that this nutrient promotes the overall levels of nitric oxide in the blood.

Nitric oxide is known as a vasodilator meaning it helps improve blood flow by dilating blood vessels and increasing blood circulation

What this means for you is that you’ll experience some fantastic muscle pumps whilst training.

Research studies have shown that you need at least 4 – 6g of Citrulline to get the full benefit.

Unfortunately Mr Hyde only contains 500mg so you are unlikely to get the desired muscle pump.

Caffeine Matrix (419mg) (376.7mg pure caffeine)

Caffeine Anhydrous (300mg)

Arguably the best natural stimulant available if not the best.

The anhydrous version is essentially pure natural caffeine with all the water content removed.

Numerous research into caffeine shows that it helps promote both energy and power output while training.

In addition it has the ability to improve focus and even increase your metabolism which can help with fat loss.

However the potential problem we see here with the caffeine matrix is that it is super strong at nearly 400mg.

At this high amount it is likely to cause side effects depending on your caffeine tolerance.

We will go in to more detail on this later.

Infinergy™ (Dicaffeine Malate) (69mg) (51.7mg pure caffeine)

A bonded combination of caffeine and Malic acid. It is formulated to allow easier digestion by buffering the salts in caffeine.

It should help prevent a crash once the caffeine has worn off but there is little scientific research to support this.